* {
    margin: 0;
    padding: 0;
}

.top {
    margin: 0;
    padding: 0;
    float: left;
    margin-left: 342px;
    margin-right: 300px;
    margin-top: 5px;
}

.top3 {
    margin-right: 30px;
    color: rgb(38, 65, 131);
    padding-top: 15px;
    float: right;
}

.top2 {
    margin: 15px 0 0 0;
    padding: 0;
    float: left;
}

.top5 {
    background: rgb(0, 30, 146);
    padding-top: 10px;
    padding-bottom: 10px;
    padding-left: 30px;
    padding-right: 30px;
    border-radius: 40px;
    margin-right: 300px;
    line-height: 30px;
    float: right;
    color: white;
}

.first {
    height: 85px;
    box-shadow: 0 20px 10px #F0F0F0;
}

.tu {
    width: 12px;
}

.what {
    font-size: 50px;
    font-weight: 600;
    color: rgb(0, 27, 97)
}

.supply {
    font-size: 48px;
    color: rgb(3, 39, 109);
    text-decoration: underline #00A5B8;
}

.second {
    margin-top: 100px;
}

.third {
    padding-top: 100px;
    width: 1100px;
    height: 245px;
    padding-left: 420px;
}

.xiang {
    margin-right: 30px;
    margin-left: 15px;
    float: left;
    width: 317px;
    margin-bottom: 100px;
}

h2 {
    color: rgb(0, 27, 97);
}

h5 {
    color: rgb(85, 129, 179);
}

l1 {
    list-style: none;
}

.top5:hover {
    background-color: rgba(85, 129, 179, 0.5)
}

.top3:hover {
    color: rgb(244, 140, 68);
}

.n {
    width: 100%;
    height: 50px;
    background: #fff;
    margin-top: 15px;
}

.disange ul {
    list-style: none;
}

.disange ul li {
    width: 102px;
    height: 50px;
    background: white;
    float: right;
}

.disange ul li:hover {
    color: #fff;
    background: rgb(255, 127, 80, 0.5);
    animation: changeColor 2s infinite;
    animation-delay: 3s;
}

.disange ul li a {
    text-decoration: none;
    color: #fff;
    display: block;
    text-align: center;
    line-height: 50px;
    font-weight: bold;
    text-transform: uppercase;
    color: #3a5494;
}

.disange ul li ul li {
    display: none;
    width: 150px;
    height: 50px;
    float: initial;
    background: white;
    font-size: 10px;
    transition: 0.3s;
    color: white;
}

.disange ul li:hover ul li {
    display: block;
    border: 1px solid rgb(250, 200, 169);
}